package algebra.query.pd;

import java.util.Set;

import entities.role.Role;

public abstract class ProjDesc {

	public abstract boolean projectOnSomeFeature();
	public abstract Set<Role> extractFeatures();
	public abstract boolean moreSpecificThan(ProjDesc that);
	public abstract boolean hasConjunctiveFeature();
	@Override
	public abstract String toString();
	public abstract String toSerializedString();

	
	
}
